SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details - Other significant accounting policies) - USD ($) $ in Millions	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle			$ (8)	$ 0
Accumulated Other Comprehensive Income
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle		$ 0	(576)	0
Retained Earnings
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle			$ 568	$ 0
Accounting Standards Update - Recognition and Measurement of Financial Assets and Financial Liabilities | Accumulated Other Comprehensive Income
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle	$ (824)
Accounting Standards Update - Recognition and Measurement of Financial Assets and Financial Liabilities | Retained Earnings
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle	824
Accounting Standards Update - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income | Accumulated Other Comprehensive Income
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle	248
Accounting Standards Update - Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income | Retained Earnings
Summary of Significant Accounting Policies [Line Items]
Cumulative effect of change in accounting principle	$ (248)